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fs: Add FS_MOUNT_FLAG_USE_DISK_ACCESS flag

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The commit adds new mount flag that requests, when supported by
a file system driver, to use Disk Access API.

Signed-off-by: Dominik Ermel <dominik.ermel@nordicsemi.no>
This commit is contained in:
Dominik Ermel 2021-11-30 09:32:27 +00:00 • committed by Christopher Friedt
commit fb2b99a06c
1 changed files with 13 additions and 2 deletions
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15
include/fs/fs.h
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@ -66,7 +66,15 @@ enum {
* This flag has no impact in user-defined mount structures.
*/
#define FS_MOUNT_FLAG_AUTOMOUNT BIT(2)
/** Flag requests file system driver to use Disk Access API. When the flag is
* set to the fs_mount_t.flags prior to fs_mount call, a file system
* needs to use the Disk Access API, otherwise mount callback for the driver
* should return -ENOSUP; when the flag is not set the file system driver
* should use Flash API by default, unless it only supports Disc Access API.
* When file system will use Disk Access API and the flag is not set, the mount
* callback for the file system should set the flag on success.
*/
#define FS_MOUNT_FLAG_USE_DISK_ACCESS BIT(3)
/**
* @brief File system mount info structure
@ -186,7 +194,8 @@ struct fs_statvfs {
#define FSTAB_ENTRY_DT_MOUNT_FLAGS(node_id) \
((DT_PROP(node_id, automount) ? FS_MOUNT_FLAG_AUTOMOUNT : 0) \
| (DT_PROP(node_id, read_only) ? FS_MOUNT_FLAG_READ_ONLY : 0) \
| (DT_PROP(node_id, no_format) ? FS_MOUNT_FLAG_NO_FORMAT : 0))
| (DT_PROP(node_id, no_format) ? FS_MOUNT_FLAG_NO_FORMAT : 0) \
| (DT_PROP(node_id, disk_access) ? FS_MOUNT_FLAG_USE_DISK_ACCESS : 0))
/**
* @brief The name under which a zephyr,fstab entry mount structure is
@ -521,6 +530,8 @@ int fs_closedir(struct fs_dir_t *zdp);
* @retval 0 on success;
* @retval -ENOENT when file system type has not been registered;
* @retval -ENOTSUP when not supported by underlying file system driver;
* when @c FS_MOUNT_FLAG_USE_DISK_ACCESS is set but driver does not
* support it.
* @retval -EROFS if system requires formatting but @c FS_MOUNT_FLAG_READ_ONLY
* has been set;
* @retval <0 an other negative errno code on error.